Improvement in dampers



S. MUNSON.

Damper.

Patented Feb. 16, 1864.

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##Znessas; v m WW4 UNITED STATES SYLVESTER MUN SON,

PATENT OFFICE.

OF J OLIET, ILLINOIS.

I IMPROVEMENT IN DAMPERS.

To all whom it may concern:

Be it known that I, SYLvEsTER MUNsoN, of J oliet, in the county of Willand State of Illinois, have invented a new and Improved Heat and DraftRegulating Valve for Stovelipes; and I do hereby declare the followingto be a full and exact description of the same, reference being bad tothe accompanying drawings, making part of this specification, in which-Figure 1 is a plan or top view of my invention, shown in position forclosing or shutting oft the draft. Fig. 2 is a similar "iew thereof,showing the draft open. Fig. 3 is a sectional elevation of the same inthe line 00 w of Fig. 1, illustrating the application of the same to astove-pipe.

.Similar letters of reference indicate corre sponding parts in theseveral views.

The OhJQCD of this invention is to obtain a valve or damper whereby thedraft in stoves may be regulated at will with great facility, and theinvention consists in the combination of two semicircular or nearlysemicircular slotted plates, adapted to slide one upon the other for thepurpose of opening and closing the draft, or to be turned-in thestove-pipe to effect this object, as will be hereinafter eX- plained.

In order that others skilled in the art to which my invention appertainsmay be enabled to fully understand and use the same, I will proceed todescribe its construction and operation.

In the accompanying drawings, a a may represent two semicircular plates,adapted to slide one upon the other and connected and guided by pins 6e, which move in slots d d, formed in the plates. Each plate is providedwith an oblong rectangular opening, 0, which openings are designed to beplaced directly over orin communication with each other when the draftis to be opened, or each of the said openings to be closed by a portionof the plate in which the other opening is made, in the manner to bedescribed. The respective plates art are supported within the pipe A bypivots or pins 12 b, the latter of which ends in a handle, I) by whichthe valve may be operated as required.

The plates at a are so constructed that when the handle b is drawnoutward to its fullest extent the said plates will completely close thepipe, prevent the existence of a draft, and retain the heated air withinthe stovethat is to say, when the plates are arranged horizontallyWithin the pipe. The plates may be so fixed within the pipe that theywill remain in a horizontal position when thus placed, but be adapted toturn therein upon the pins b I) and remain in a vertical position inorder to create a stronger draft of air, but in common the plates may beallowed to remain in a horizontal position and sufficient draft obtainedby placing the openings cv one above the other by pushing in the handleW.

This invention is simple, may be readily modified to conform to theshape of any pipe, and with it the required functions may be performedin a most efficient and facile manner.

Having thus described my invention, what I claim as new therein, anddesire to secure by Letters Patent, is-

The damper or valve herein described and represented, composed of twoplates, at and a, arranged in relation to each other so as to operate inthe manner and for the purpose set forth.

SYLVESTER MUNSON.

Witnesses:

WM. STAEHLE, WM. GRINTON.

